American No 1

Billie Jean King won 39 Grand Slam titles, including 12 singles, 16 women's doubles, and 11 mixed doubles titles and she  won the singles title at the inaugural WTA Tour Championships.

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King often represented the United States in the Federation Cup and the Wightman Cup. She was a member of the victorious United States team in seven Federation Cups and nine Wightman Cups. For three years, King was the United States' captain in the Federation Cup.

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King is an advocate for sexual equality. In 1973, at age 29, she won the

so-called Battle of the Sexes tennis match against the 55-year-old Bobby Riggs, and was the founder of the Women's Tennis Association, World Team Tennis (with former husband Larry King), and the Women's Sports Foundation.

Source: wikipedia.com

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